问题

I tried to find ________ that prevented so many people from taking part in the program

A:why it did
B:what it was
C:that it did
D:why it was

正确答案是：

同类题型

label to each of thetrees, with detailed introduction of their features, and visitors will knowmore about them and how to protect them.

It’s crazy of you to spend more time playing computer games than you _______ studying.

Use your head,___ you’ll find a good way

The new shop announced that the first to purchase goods on the opening day get a big prize.

Whois___________studentinourclass?